CN114143489A - CTVS (China train visual switching) integrated head-up display recorded video lossless calibration method - Google Patents
CTVS (China train visual switching) integrated head-up display recorded video lossless calibration method Download PDFInfo
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- CN114143489A CN114143489A CN202111364927.XA CN202111364927A CN114143489A CN 114143489 A CN114143489 A CN 114143489A CN 202111364927 A CN202111364927 A CN 202111364927A CN 114143489 A CN114143489 A CN 114143489A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention discloses a CTVS integrated head-up display recording video lossless calibration method, which reserves CTVS field margin and pixel margin according to maximum error, dynamically adjusts the actual position of an output image on an original picture through three-stage calibration of CTVS assembly calibration, head-up display assembly calibration and on-board calibration, and outputs the image according to the final calibration result. The method can dynamically adjust the actual position of the output image on the original frame, so that the output image after calibration is complete and accurate, and no black edge caused by translation or black frame caused by scaling exists.
Description
Technical Field
The invention belongs to the technical field of aviation, and particularly relates to a CTVS (China train navigation satellite System) integrated head-up display recording video nondestructive calibration method.
Background
Head-Up Display (HUD), which is a flight assistance instrument commonly used in aircrafts, is called Head Up Display for short. By "heads-up" is meant that the pilot is able to see the important information needed without lowering his head. Head-up displays were first presented on military aircraft, reducing the frequency with which pilots need to look down at the instruments, avoiding interruptions in attention to the road ahead and loss of Awareness of the state (status Awareness). Because of the convenience of the HUD and the capability of improving flight safety, civil aircrafts are also installed in succession, and are now gradually applied to the field of automobiles.
As a main display of the aircraft cabin, the output recorded video pictures simultaneously comprise a view picture in front of the pilot and a character picture displayed on the display, and are important data information for evaluation, research and analysis after the pilot trains. The integrity and the accuracy of the head-up display recorded video pictures play a crucial role in the analysis and research of the flight state of the airplane and the operation information of the pilot, and especially have important significance in the training and the efficiency analysis of the airplane and the pilot and the improvement of the flight capability.
In a common situation, a CTVS (cabin television camera) image is acquired by a head-up display and then is superposed with a head-up display character picture, calibration is performed in the superposition process, central translation or scaling is required when the CTVS image is calibrated, partial information is lost in a superposition area, and the head-up display recorded video is incomplete and the precision is reduced. Therefore, there is a need to optimize the recorded video for flat display, and improve the integrity and accuracy of the recorded video for flat display.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a CTVS integrated head-up display recording video lossless calibration method, wherein CTVS field margin and pixel margin are reserved according to the maximum error, the actual position of an output image on an original frame is dynamically adjusted through three-stage calibration of CTVS assembly calibration, head-up display assembly calibration and on-board boresight calibration, and the image is output according to the final calibration result. The method can dynamically adjust the actual position of the output image on the original frame, so that the output image after calibration is complete and accurate, and no black edge caused by translation or black frame caused by scaling exists.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
step 1: the reserved field of view allowance of the CTVS optical lens is V which is more than or equal to V1+ V2+ V3, wherein V1 is the installation and adjustment field of view error of the cockpit television camera, V2 is the assembly field of view error of the cockpit television camera and the head-up display, and V3 is the calibration target field of view error of the head-up display;
step 2: the reserved pixel allowance of the CTVS image sensor is R is more than or equal to R1+ R2+ R3, wherein R1 is the self-adjusting pixel error of the cockpit television camera, R2 is the assembling pixel error of the cockpit television camera and the head-up display, and R3 is the calibrating pixel error of the head-up display;
and step 3: calibrating the self-debugging error of the CTVS, and storing error calibration parameters in the CTVS;
and 4, step 4: calibrating the installation and adjustment errors of the CTVS and the head-up display, and storing error calibration parameters in the head-up display;
and 5: after the CTVS integrated flat display is electrified, the CTVS reads the self error calibration parameters obtained in the step 3 and carries out center calibration on the output image;
step 6: the head-up display reads the stored CTVS and head-up display assembly error calibration parameters, the parameters are sent to the CTVS through an RS485 bus, and the CTVS performs secondary calibration on the center of the output image according to the parameters;
and 7: reading the boresight parameters of the airplane by the head-up display, sending the boresight parameters to the CTVS through the RS485 bus, and carrying out third calibration on the center of an output image by the CTVS according to the parameters;
and 8: the method comprises the steps that a video image which is output by CTVS and is subjected to three times of calibration is collected through the flat display, and the video image is output and recorded after being overlapped with a character image of the flat display;
and step 9: and finishing the lossless calibration of the head-up display recorded video.
Further, the v1, v2, r1 and r2 are set in the process of product production and adjustment; v3 and r3 are obtained after being matched and adjusted with the airplane after being installed.
The invention has the following beneficial effects:
the invention adopts a method of reserving CTVS field allowance and pixel allowance, the reserved field and pixel allowance is larger than CTVS self-debugging error, CTVS and head-up display assembly error and on-machine boresight error, the actual position of the output image on the original picture is dynamically adjusted through three-stage calibration of CTVS debugging calibration, head-up display debugging calibration and on-machine boresight calibration, so that the output image after calibration is complete and accurate, and no black edge caused by translation or black frame caused by scaling exists.
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FIG. 1 is a flow chart of a CTVS integrated head-up display recording video lossless calibration method of the present invention.
FIG. 2 is a schematic diagram of an embodiment of a CTVS integrated head-up display recording video lossless calibration method of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The invention aims to provide a CTVS (computer-to-video-switching) integrated head-up video lossless calibration method, which can improve the integrity and the accuracy of a head-up video.
As shown in fig. 2, which is a schematic diagram of an embodiment of the CTVS integrated flat display recording video lossless calibration method of the present invention, it can be seen that the circuit includes a flat display recording video processing circuit 1, a CTVS image processing circuit 2, a CTVS calibration parameter memory 3, a CTVS and a flat display assembly calibration parameter memory 4.
As shown in fig. 1, a method for lossless calibration of CTVS integrated head-up display recorded video includes the following steps:
step 1: the reserved field of view allowance of the CTVS optical lens is V which is more than or equal to V1+ V2+ V3, wherein V1 is the installation and adjustment field of view error of the cockpit television camera, V2 is the assembly field of view error of the cockpit television camera and the head-up display, and V3 is the calibration target field of view error of the head-up display;
step 2: the reserved pixel allowance of the CTVS image sensor is R is more than or equal to R1+ R2+ R3, wherein R1 is the self-adjusting pixel error of the cockpit television camera, R2 is the assembling pixel error of the cockpit television camera and the head-up display, and R3 is the calibrating pixel error of the head-up display;
and step 3: calibrating the self-debugging error of the CTVS, and storing error calibration parameters in the CTVS;
and 4, step 4: calibrating the installation and adjustment errors of the CTVS and the head-up display, and storing error calibration parameters in the head-up display;
and 5: after the CTVS integrated flat display is electrified, the CTVS reads the self error calibration parameters obtained in the step 3 and carries out center calibration on the output image;
step 6: the head-up display reads the stored CTVS and head-up display assembly error calibration parameters, the parameters are sent to the CTVS through an RS485 bus, and the CTVS performs secondary calibration on the center of the output image according to the parameters;
and 7: reading the boresight parameters of the airplane by the head-up display, sending the boresight parameters to the CTVS through the RS485 bus, and carrying out third calibration on the center of an output image by the CTVS according to the parameters;
and 8: the method comprises the steps that a video image which is output by CTVS and is subjected to three times of calibration is collected through the flat display, and the video image is output and recorded after being overlapped with a character image of the flat display;
and step 9: and finishing the lossless calibration of the head-up display recorded video.
Further, the v1, v2, r1 and r2 are set in the process of product production and adjustment; v3 and r3 are obtained after being matched and adjusted with the airplane after being installed.
Claims (2)
1. A CTVS integrated head-up display recording video lossless calibration method is characterized by comprising the following steps:
step 1: the reserved field of view allowance of the CTVS optical lens is V which is more than or equal to V1+ V2+ V3, wherein V1 is the installation and adjustment field of view error of the cockpit television camera, V2 is the assembly field of view error of the cockpit television camera and the head-up display, and V3 is the calibration target field of view error of the head-up display;
step 2: the reserved pixel allowance of the CTVS image sensor is R is more than or equal to R1+ R2+ R3, wherein R1 is the self-adjusting pixel error of the cockpit television camera, R2 is the assembling pixel error of the cockpit television camera and the head-up display, and R3 is the calibrating pixel error of the head-up display;
and step 3: calibrating the self-debugging error of the CTVS, and storing error calibration parameters in the CTVS;
and 4, step 4: calibrating the installation and adjustment errors of the CTVS and the head-up display, and storing error calibration parameters in the head-up display;
and 5: after the CTVS integrated flat display is electrified, the CTVS reads the self error calibration parameters obtained in the step 3 and carries out center calibration on the output image;
step 6: the head-up display reads the stored CTVS and head-up display assembly error calibration parameters, the parameters are sent to the CTVS through an RS485 bus, and the CTVS performs secondary calibration on the center of the output image according to the parameters;
and 7: reading the boresight parameters of the airplane by the head-up display, sending the boresight parameters to the CTVS through the RS485 bus, and carrying out third calibration on the center of an output image by the CTVS according to the parameters;
and 8: the method comprises the steps that a video image which is output by CTVS and is subjected to three times of calibration is collected through the flat display, and the video image is output and recorded after being overlapped with a character image of the flat display;
and step 9: and finishing the lossless calibration of the head-up display recorded video.
2. The method for the CTVS integrated flat screen recording video lossless calibration, according to claim 1, wherein v1, v2, r1, r2 are set during the product production setup process; v3 and r3 are obtained after being matched and adjusted with the airplane after being installed.
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Citations (4)
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|---|---|---|---|---|
| US4454496A (en) * | 1980-10-30 | 1984-06-12 | Mcdonald Douglas Corporation | Conformal head-up display |
| US7982959B1 (en) * | 2010-08-02 | 2011-07-19 | Matvey Lvovskiy | Head-up display |
| CN110864878A (en) * | 2019-10-14 | 2020-03-06 | 中国航空工业集团公司洛阳电光设备研究所 | Method for detecting display distortion of high-efficiency large-view-field flat display system |
| CN112284685A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Head-up display optical machine inspection bench calibration device and calibration method |
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- 2021-11-17 CN CN202111364927.XA patent/CN114143489B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4454496A (en) * | 1980-10-30 | 1984-06-12 | Mcdonald Douglas Corporation | Conformal head-up display |
| US7982959B1 (en) * | 2010-08-02 | 2011-07-19 | Matvey Lvovskiy | Head-up display |
| CN110864878A (en) * | 2019-10-14 | 2020-03-06 | 中国航空工业集团公司洛阳电光设备研究所 | Method for detecting display distortion of high-efficiency large-view-field flat display system |
| CN112284685A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Head-up display optical machine inspection bench calibration device and calibration method |
Non-Patent Citations (3)
| Title |
|---|
| S. DANILOV: "SYNTHETIC VISION SYSTEM CALIBRATION FOR CONFORM PROJECTION ON THE PILOT’S HEAD-UP DISPLAY", ISPRS - INTERNATIONAL ARCHIVES OF THE PHOTOGRAMMETRY, REMOTE SENSING AND SPATIAL INFORMATION SCIENCES * |
| 周凤利;徐丹;: "平视显示器视差自动测量技术研究", 光电工程, no. 08 * |
| 张则源: "某型平视显示器检测仪的研制", 航空维修与工程 * |
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